<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
            <el-button slot="append" icon="el-icon-search" @click="getQueryList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="goAddpage">添加商品</el-button>
        </el-col>
      </el-row>
      <!-- table表格区域 -->
      <el-table :data="goodslist" border stripe>
          <el-table-column type="index"></el-table-column>
          <el-table-column label="商品名称" prop="goods_name"></el-table-column>
          <el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
          <el-table-column label="商品重量" prop="goods_weight" width="70px"></el-table-column>
          <el-table-column label="创建时间" prop="add_time" width="140px">
              <template slot-scope="scope">
                  {{scope.row.add_time | dateFormat}}
              </template>
          </el-table-column>
          <el-table-column label="操作" width="180px">
              <template slot-scope="scope">
                  <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.goods_id)">编辑</el-button>
                  <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeById(scope.row.goods_id)">删除</el-button>
              </template>
          </el-table-column>
    </el-table>

    <!-- 分页区域 -->
    <el-pagination @size-change="handleSizeChange" 
    @current-change="handleCurrentChange" :current-page="queryInfo.pagenum" 
    :page-sizes="[5, 10, 15, 20]" :page-size="queryInfo.pagesize" 
    layout="total, sizes, prev, pager, next, jumper" 
    :total="total" background></el-pagination>
    </el-card>

     <!-- 修改商品列表的对话框 -->
    <el-dialog title="修改商品列表" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <!--内容主题-->
      <el-form :model="editGoodsForm" :rules="editGoodsFormRules" ref="editGoodsFormRef" label-width="70px">
        <el-form-item label="商品名称" prop="goods_name">
          <el-input v-model="editGoodsForm.goods_name"></el-input>
        </el-form-item>
        <el-form-item label="价格" prop="goods_price">
          <el-input v-model="editGoodsForm.goods_price"></el-input>
        </el-form-item>
        <el-form-item label="重量" prop="goods_weight">
          <el-input v-model="editGoodsForm.goods_weight"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editGoodsMessage()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        // 查询参数对象
        queryInfo: {
          query: '',//表示查询关键字
          pagenum: 1,//表示当前页码值
          pagesize: 10//表示一页有多少行数据
        },
        // 商品列表
        goodslist: [],
        // 总数据条数
        total: 0,
        // 控制修改商品分类对话框的显示与隐藏
      editDialogVisible: false,
              // 查询到的商品分类信息对象
      editGoodsForm: {},
          //如果修改商品分类对象也会自动同步在editGoodsForm中，
          //所以想要修改就可以从editGoodsForm中调用就行
          // 修改表单的验证规则对象
      editGoodsFormRules: {
      goods_name: [
          { required: true, message: '商品名称', trigger: 'blur' }
        ],
      goods_price: [
          { required: true, message: '价格', trigger: 'blur' }
      ],
      goods_weight: [
          { required: true, message: '重量', trigger: 'blur' }
      ]
      },
      }
    },
    created() {
      this.getGoodsList()
    },
    methods: {
      // 根据分页获取对应的商品列表
      async getGoodsList() {
        const { data: res } = await this.$http.get('goods', {
          params: this.queryInfo
        })
  
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品列表失败！')
        }
  
        this.$message.success('获取商品列表成功！')
        console.log(res.data)
        this.goodslist = res.data.goods
        this.total = res.data.total
      },
      //在输入框里没有数据但点击搜索时跳转到第一页
      getQueryList() {
        this.queryInfo.pagenum = 1
        this.getGoodsList()
      },
      //监听 pagesize 改变的事件
      handleSizeChange(newSize) {
        this.queryInfo.pagesize = newSize
        this.getGoodsList()
      },
      // 监听 页码值 改变的事件
      handleCurrentChange(newPage) {
        this.queryInfo.pagenum = newPage
        this.getGoodsList()
      },

       // 展示编辑商品的对话框
  async showEditDialog(goods_id) {
    // console.log(goods_id)
    const { data: res } = await this.$http.get(`goods/${goods_id}`)
    // console.log(res)
    if (res.meta.status !== 200) {
      return this.$message.error('查询商品信息失败！')
    }

    this.editGoodsForm = res.data
    this.editDialogVisible = true
  },
  // 监听修改商品对话框的关闭事件
  editDialogClosed() {
      this.$refs.editGoodsFormRef.resetFields()
    },
// 确认提交编辑商品
editGoodsMessage() {
    this.$refs.editGoodsFormRef.validate(async valid => {
        if (!valid) {
            return this.$message.error('请填写必要的表单项！')
        }
        const { data: res } = await this.$http.put(
            `goods/${this.editGoodsForm.goods_id}`,
            this.editGoodsForm
        )
        if (res.meta.status !== 200) {
            return this.$message.error('编辑商品信息失败！')
        } 
        // 关闭对话框
        this.$message.success('编辑商品信息成功！')
        // 刷新数据列表
        this.getGoodsList()
        // 关闭对话框
        this.editDialogVisible = false
    })
    // 关闭对话框
    this.editDialogVisible = false
},
      //根据ID删除列表数据
      async removeById(id) {
        const confirmResult = await this.$confirm(
          '此操作将永久删除该商品, 是否继续?',
          '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)
  
        if (confirmResult !== 'confirm') {
          return this.$message.info('已经取消删除！')
        }
  
        const { data: res } = await this.$http.delete(`goods/${id}`)
  
        if (res.meta.status !== 200) {
          return this.$message.error('删除失败！')
        }
  
        this.$message.success('删除成功！')
        this.getGoodsList()
      },
      //
      goAddpage() {
        this.$router.push('/goods/add')
      }
    }
  }
</script>
  
<style lang="less" scoped>
</style>
  